Old, not obsolete: IBM takes Linux mainframes back to the future
IBM introduced several significant new elements for its Linux server stack last month: support for KVM on its z Systems mainframes, Linux-only models in both the z Systems and Power Systems ranges, and a new purchasing model.
The most technically interesting new development is mainframe support for KVM, the Linux kernel’s built-in hypervisor. Although this is just a new way to access facilities that existing IBM products offer, it may help drive migration of x86 workloads onto IBM’s highest-end kit.
Big Blue’s big iron already has rich virtualisation offerings. At the lowest level, the PR/SM facility splits each machine’s resources into multiple logical partitions (LPARs), each appearing as a separate machine with a portion of the host’s processing and storage capacity. Even if the machine’s configured as a single unit, it’s really one LPAR.
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